Erythranthe trinitiensis

Annuals, shallowly fibrous-rooted. Stems erect, straight at nodes, simple or branched at base, 5–15 cm, puberulent, hairs gland-tipped, glands often dark. Leaves mostly cauline, largest at mid stem; petiole 4–8 mm, 1-veined, not winged; blade palmately 3-veined, ovate to elliptic-ovate, 6–17 × 4–9 mm, base attenuate, margins entire or dentate-serrate, teeth 1–2 per side, shallow, apex acute, surfaces puberulent, hairs gland-tipped, glands often dark, adaxial sometimes sparsely villous-glandular. Flowers herkogamous, 1–12, from proximal to distal nodes. Fruiting pedicels divergent-arcuate, 9–17 mm. Fruiting calyces oblong-ovoid, distinctly inflated, 8–10 mm, margins distinctly toothed or lobed, puberulent, hairs gland-tipped, glands often dark, lobes pronounced, erect. Corollas yellow and light pink to white, tube-throat yellow (inner and outer surfaces), lobes (limb) pink or white with pink distal borders, palate ridges yellow, throat floor and ridges weakly red-spotted, bilaterally symmetric, weakly bilabiate; tube-throat funnelform, 7–10 mm, exserted beyond calyx margin. Styles glabrous. Anthers included, glabrous. Capsules included, 6–8 mm.

Phenology: Flowering Jun–Jul(–Aug).
Habitat: Seeps over serpentine, wet meadows, roadsides.
Elevation: 1300–2000 m.

Calif.

Discussion

Erythranthe trinitiensis is similar to E. pulsiferae in its narrow leaves, glandular-puberulent vestiture, and weakly bilabiate corollas; it differs in its early-shed basal leaves, cauline leaves with one-veined petioles, and yellow corolla tubes and throats with pink lobes or lobe margins. The species is known only in Humboldt, Siskiyou, and Trinity counties.

Selected References

None.

Lower Taxa